C/stdio.h/ftell — различия между версиями

    
//Header file:     #include <stdio.h>  
//Declaration      long int ftell(FILE *stream); 
//Return:          returns -1 on failure. 
  
   #include <stdio.h>
   #include <stdlib.h>
   int main(void){
      FILE *fp;
      if((fp=fopen("test", "rb")) == NULL) {
        printf("Cannot open file.\n");
        exit(1);
      }

      int i;
      if((i=ftell(fp)) == -1L)
         printf("A file error has occurred.\n");
      fclose(fp);
   }